Everyone's had really good suggestions! A few more...
Know your real living cost priorities from your non-priorities. Top priorities are the things that have the worst consequences if you don't/can't pay them (i.e., rent/mortgage, council tax, utilities, child support, food within reason). Cut out the luxuries just as you've indicated. If after paying your top priority bills, you don't have enough to make full payments on unsecured debts, don't be pressured into paying what you can't afford. (Unsecured creditors are always the ones that scream the loudest if you can't afford to pay them, because they have lesser recourse/consequence against someone than the landlord, mortgage lender, council, CSA administration, etc. Hence the high pressure tactics of debt collectors. You should never not pay your rent/mortgage, council tax, other priorities in favour of paying unsecured creditors. I know this may seem obvious, but sometimes when a person is being pressured by a debt collector, well I've seen so many people do this & it's really unwise.)
Have a good look at & review of your priority costs. Can you find cheaper digs? Go on Uswitch.com to see if you can get your gas & leccy any cheaper? We did that recently & saved ourselves quite a bit (we had to switch providers). Money Saving Expert dude was saying recently that now is a good time to do it, because some of the offers out there right now allow you to lock in a certain rate per unit for a period of time (a year or so) before the utility companies raise rates again.
We did a budget recently, because I was thinking of quitting my job (but didn't, yet). We switched over our gas & leccy providers to cheaper plans. We cut back our TV/phone/broadband package with Virgin to something more basic (we don't watch a lot of TV anyway). Examining our bank statement with a fine tooth comb, found out that DH was contributing
double to a charity when he meant to be making only one direct debit for it a month. And just started asking ourselves - gosh where is all our money going?
We started packing a lot more lunches & cooking more vegetarian meals. I've hardly bought any booze for a month or so, and that took our grocery bill right down too.

We are planning to change banks also, to an account that charges less/no fees & has higher customer service ratings than where we bank now. (Haven't got to doing that yet.) Right now, the monthly service charge we pay the bank includes breakdown cover & travel insurance (among other things), but we can get those cheaper by going to direct with a breakdown/insurance company than the rate we are paying the bank monthly.
Some bills if you sign up for online statements (paperless billing), you get a wee discount for that.
When our car insurance is coming due again (paid annually), we are going to see if we can get something cheaper for that.
We keep a car, but we don't use it very much. We walk or use public transport - we do have transport costs for getting to our jobs. However, we spend hardly anything as far as petrol and upkeep on the car, because we use it infrequently. If push came to shove, we could live without the car if we had to.
Everyone has had great ideas for saving on the grocery bill! At our house, we throw out very, very little food, if any. We eat it all up & we love leftovers.

For fun stuff, agree with using the library, board games, going for walks/bike rides, etc (you live in a beautiful place!). Charity shops - great idea too.
I also think swapsies are a great idea, if you can work out a way to do that. If you have a decent group/number of friends, how about getting together to swap clothes, books, DVDs, etc. Or bartering services, like babysitting or ironing or cleaning or whatever in return for a friend doing something else for you. It may be a throwback to earlier times, but what a way of saving/exchanging services and developing a sense of community too!
If there's a magazine subscription or something you want to keep, how about putting it on your Christmas or birthday list for someone else to treat you?
Lastly, if unsecured debt is a concern, get some advice from somewhere that's
free. If you think you want or need a debt management plan (reduced repayment scheme for debts that is administered by a third party), stay away from fee chargers! Those are the ones where you have to pay a fee for the advice and/or they take a fee from what you pay them, before they pay the remaining over to your creditors. Don't do it. There are good places that do it for free! You can see CAB for advice (be aware that CAB is frequently in great demand & understaffed & with a dearth of financial resources). Two free DMP companies/charities are PayPlan and CCCS - there may be others, but I think those two are the biggest & best.
Yes, selling on Ebay, babysitting, etc...also get to writing & get your stuff out there to get paid!
